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Title:An Optically-Pumped Frequency Stable Tunable Maser and Infrared-Microwave Double-Resonance Experiments in Ammonia
Author(s):Malk, Edward George
Department / Program:Electrical Engineering
Discipline:Electrical Engineering
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Physics, Molecular
Abstract:Microwave emission attributed to a linear cascade effect has been observed from ('14)NH(,3) optically pumped by a CO(,2) laser. The emission is tunable over the saturated homogeneous linewidth of the ground state sQ(5,4) inversion transition at 22.653 GHz. The circulating power density of the optically pumped emission is 0.54 watts/cm('2) at NH(,3) pressure of 0.91 torr and CO(,2) R(6)(,10) laser pulse energy of 60 mJ. The cell design and frequency characteristics are presented as an Appendix.
Infrared-microwave double-resonance experiments have been performed at higher microwave powers than reported in the literature. Two previously unreported double-resonances have been observed using a CO(,2) laser, aQR(2,1) (P(40)(,9) + 33.05 GHz) and aQR(2,2) (P(40)(,9) + 34.14 GHz). The cells designed and the data acquisition techniques developed are presented.
The linear and non-linear (i.e., single and multiple photon) spectroscopy of ('14)NH(,3) is considered in detail as the subject of an Appendix. Tables of energy levels, ground state inversion transitions, and laser-NH(,3) absorption matches are also included.
Issue Date:1980
Description:137 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1980.
Other Identifier(s):(UMI)AAI8026552
Date Available in IDEALS:2014-12-12
Date Deposited:1980

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